1 /******************************************************************************
4 * Guest OS interface to x86 Xen.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
24 * Copyright (c) 2004-2006, K A Fraser
29 #ifndef __XEN_PUBLIC_ARCH_X86_XEN_H__
30 #define __XEN_PUBLIC_ARCH_X86_XEN_H__
32 /* Structural guest handles introduced in 0x00030201. */
33 #if __XEN_INTERFACE_VERSION__ >= 0x00030201
34 #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
35 typedef struct { type *p; } __guest_handle_ ## name
37 #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
38 typedef type * __guest_handle_ ## name
41 #define __DEFINE_XEN_GUEST_HANDLE(name, type) \
42 ___DEFINE_XEN_GUEST_HANDLE(name, type); \
43 ___DEFINE_XEN_GUEST_HANDLE(const_##name, const type)
44 #define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name)
45 #define __XEN_GUEST_HANDLE(name) __guest_handle_ ## name
46 #define XEN_GUEST_HANDLE(name) __XEN_GUEST_HANDLE(name)
47 #define set_xen_guest_handle_raw(hnd, val) do { (hnd).p = val; } while (0)
49 #define get_xen_guest_handle(val, hnd) do { val = (hnd).p; } while (0)
51 #define set_xen_guest_handle(hnd, val) set_xen_guest_handle_raw(hnd, val)
53 /* Allow co-existing Linux 2.6.23+ Xen interface definitions. */
54 #define DEFINE_GUEST_HANDLE_STRUCT(name) struct name
57 #include "xen-x86_32.h"
58 #elif defined(__x86_64__)
59 #include "xen-x86_64.h"
63 typedef unsigned long xen_pfn_t;
64 #define PRI_xen_pfn "lx"
68 * SEGMENT DESCRIPTOR TABLES
71 * A number of GDT entries are reserved by Xen. These are not situated at the
72 * start of the GDT because some stupid OSes export hard-coded selector values
73 * in their ABI. These hard-coded values are always near the start of the GDT,
74 * so Xen places itself out of the way, at the far end of the GDT.
76 #define FIRST_RESERVED_GDT_PAGE 14
77 #define FIRST_RESERVED_GDT_BYTE (FIRST_RESERVED_GDT_PAGE * 4096)
78 #define FIRST_RESERVED_GDT_ENTRY (FIRST_RESERVED_GDT_BYTE / 8)
80 /* Maximum number of virtual CPUs in legacy multi-processor guests. */
81 #define XEN_LEGACY_MAX_VCPUS 32
85 typedef unsigned long xen_ulong_t;
89 * ` HYPERVISOR_set_trap_table(const struct trap_info traps[]);
93 * Send an array of these to HYPERVISOR_set_trap_table().
94 * Terminate the array with a sentinel entry, with traps[].address==0.
95 * The privilege level specifies which modes may enter a trap via a software
96 * interrupt. On x86/64, since rings 1 and 2 are unavailable, we allocate
97 * privilege levels as follows:
98 * Level == 0: Noone may enter
99 * Level == 1: Kernel may enter
100 * Level == 2: Kernel may enter
101 * Level == 3: Everyone may enter
103 #define TI_GET_DPL(_ti) ((_ti)->flags & 3)
104 #define TI_GET_IF(_ti) ((_ti)->flags & 4)
105 #define TI_SET_DPL(_ti,_dpl) ((_ti)->flags |= (_dpl))
106 #define TI_SET_IF(_ti,_if) ((_ti)->flags |= ((!!(_if))<<2))
108 uint8_t vector; /* exception vector */
109 uint8_t flags; /* 0-3: privilege level; 4: clear event enable? */
110 uint16_t cs; /* code selector */
111 unsigned long address; /* code offset */
113 typedef struct trap_info trap_info_t;
114 DEFINE_XEN_GUEST_HANDLE(trap_info_t);
116 typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */
119 * The following is all CPU context. Note that the fpu_ctxt block is filled
120 * in by FXSAVE if the CPU has feature FXSR; otherwise FSAVE is used.
122 struct vcpu_guest_context {
123 /* FPU registers come first so they can be aligned for FXSAVE/FXRSTOR. */
124 struct { char x[512]; } fpu_ctxt; /* User-level FPU registers */
125 #define VGCF_I387_VALID (1<<0)
126 #define VGCF_IN_KERNEL (1<<2)
127 #define _VGCF_i387_valid 0
128 #define VGCF_i387_valid (1<<_VGCF_i387_valid)
129 #define _VGCF_in_kernel 2
130 #define VGCF_in_kernel (1<<_VGCF_in_kernel)
131 #define _VGCF_failsafe_disables_events 3
132 #define VGCF_failsafe_disables_events (1<<_VGCF_failsafe_disables_events)
133 #define _VGCF_syscall_disables_events 4
134 #define VGCF_syscall_disables_events (1<<_VGCF_syscall_disables_events)
135 #define _VGCF_online 5
136 #define VGCF_online (1<<_VGCF_online)
137 unsigned long flags; /* VGCF_* flags */
138 struct cpu_user_regs user_regs; /* User-level CPU registers */
139 struct trap_info trap_ctxt[256]; /* Virtual IDT */
140 unsigned long ldt_base, ldt_ents; /* LDT (linear address, # ents) */
141 unsigned long gdt_frames[16], gdt_ents; /* GDT (machine frames, # ents) */
142 unsigned long kernel_ss, kernel_sp; /* Virtual TSS (only SS1/SP1) */
143 /* NB. User pagetable on x86/64 is placed in ctrlreg[1]. */
144 unsigned long ctrlreg[8]; /* CR0-CR7 (control registers) */
145 unsigned long debugreg[8]; /* DB0-DB7 (debug registers) */
147 unsigned long event_callback_cs; /* CS:EIP of event callback */
148 unsigned long event_callback_eip;
149 unsigned long failsafe_callback_cs; /* CS:EIP of failsafe callback */
150 unsigned long failsafe_callback_eip;
152 unsigned long event_callback_eip;
153 unsigned long failsafe_callback_eip;
156 unsigned long syscall_callback_eip;
158 unsigned int event_callback_cs; /* compat CS of event cb */
159 unsigned int failsafe_callback_cs; /* compat CS of failsafe cb */
163 unsigned long syscall_callback_eip;
166 unsigned long vm_assist; /* VMASST_TYPE_* bitmap */
168 /* Segment base addresses. */
170 uint64_t gs_base_kernel;
171 uint64_t gs_base_user;
174 typedef struct vcpu_guest_context vcpu_guest_context_t;
175 DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t);
177 struct arch_shared_info {
178 unsigned long max_pfn; /* max pfn that appears in table */
179 /* Frame containing list of mfns containing list of mfns containing p2m. */
180 xen_pfn_t pfn_to_mfn_frame_list_list;
181 unsigned long nmi_reason;
184 typedef struct arch_shared_info arch_shared_info_t;
186 #endif /* !__ASSEMBLY__ */
189 * Prefix forces emulation of some non-trapping instructions.
190 * Currently only CPUID.
193 #define XEN_EMULATE_PREFIX .byte 0x0f,0x0b,0x78,0x65,0x6e ;
194 #define XEN_CPUID XEN_EMULATE_PREFIX cpuid
196 #define XEN_EMULATE_PREFIX ".byte 0x0f,0x0b,0x78,0x65,0x6e ; "
197 #define XEN_CPUID XEN_EMULATE_PREFIX "cpuid"
200 #endif /* __XEN_PUBLIC_ARCH_X86_XEN_H__ */
208 * indent-tabs-mode: nil